<template>
    <div>
      <!--  面包屑导航-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
<!--      卡片视图区域-->
      <el-card>
<!--        alert消息提示-->
        <el-alert
          title="添加商品信息"
          type="info"
          show-icon
          center
          :closable="false">
        </el-alert>
<!--        步骤条 active-0 得到的索引为数字-->
        <el-steps :active="active - 0" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
<!--        表单区域-->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
<!--        tabs标签页-->
          <el-tabs v-model="active" :tab-position="'left'" :before-leave="beforeTableLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="cateProps"
                  @change="handleChange"></el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
<!--              上传文件-->
              <el-upload
                action="http://127.0.0.1:8888/api/private/v1/upload"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headersObj"
                :on-success="handleSuccess">
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
              </el-upload>

            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <el-button type="primary" class="quillBtn" @click="addGoods">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>
<!--      图片预览对话框-->
      <el-dialog
        title="图片预览"
        :visible.sync="dialogVisible"
        width="50%">
        <img :src="previewPath" alt="" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data () {
    return {
      // 步骤条默认选中
      active: '0',
      // 添加商品表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 1,
        goods_number: 1,
        goods_weight: 1,
        // 商品分类数组
        goods_cat: [],
        // 上传的图片对象
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      // 添加商品表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类数据列表
      cateList: [],
      // 级联选择框配置选项
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 上传图片的请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览保存路径
      previewPath: '',
      dialogVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品分类
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败')
      }
      this.cateList = res.data
    },
    // 选择级联选择数据
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        // goods_cat重置
        this.addForm.goods_cat = []
      }
    },
    // 切换tab的钩子
    // activeName 切换之后的tab名称, oldActiveName 切换之前的tab名称
    beforeTableLeave (activeName, oldActiveName) {
      // console.log('切换之前' + oldActiveName)
      // console.log('切换之后' + activeName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // 切换tab获取动态参数数据
    async tabClicked () {
      // 打印当前active名称
      console.log(this.active)
      // 判断选择的是否为动态参数
      if (this.active === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败')
        }
        // console.log(res.data)
        // 把attr_vals赋值为数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        // 保存到manyTableData 中
        this.manyTableData = res.data
      } else if (this.active === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败')
        }
        console.log(res.data)
        // 保存到onlyTableData 中
        this.onlyTableData = res.data
      }
    },
    // 图片上传预览
    handlePreview (file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.dialogVisible = true
    },
    // 图片删除
    handleRemove (file) {
      // console.log(file)
      // 1、获取删除图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2、从pics数组中找到对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3、调用数组的splice方法，把图片信息从pics数组中删除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm.pics)
    },
    // 监听图片上传成功的事件
    handleSuccess (response) {
      // console.log(response)
      // 1、拼接图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2、将图片信息对象push到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 添加商品
    addGoods () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('填写必填项')
        }
        // 发起保存请求
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        // this.manyTableData.forEach(item => {
        //   const newInfo = {
        //     attr_id: item.attr_id,
        //     attr_value: item.attr_vals.join(' ')
        //   }
        //   this.addForm.attrs.push(newInfo)
        // })
        // // 处理静态属性
        // this.onlyTableData.forEach(item => {
        //   const newInfo = {
        //     attr_id: item.attr_id,
        //     attr_value: item.attr_vals
        //   }
        //   this.addForm.attrs.push(newInfo)
        // })
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        // 发起添加请求
        const { data: res } = await this.$http.post('goods', form)
        console.log(res)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败！')
        this.$message.success('添加商品成功!')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    // 级联选择框为三级时候返回数组
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
.el-steps {
  margin: 15px 0;
}
.el-checkbox {
  margin: 0 0 0 10px;
}
.previewImg {
  width: 100%;
}
.quillBtn {
  margin-top: 15px;
}
</style>
